Thank you for the info. That engine is 14HP and should be the spec for the 36" cut deckMost likely you have FC420V series engine which Scag start listing in the IPL when the 7 digit serial numbers appeared. Doesn't list a spec number. Also is could be recoil or electric start version.
I'll have to look to see what bore size I have to be sure, but it gives me direction now.I not saying it not spec'd that mower. I saying that you would looking various FC420V engine to find the correct parts as there are multiple versions out there under under different spec (type) numbers.